1
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Takeuchi K, Sato R, Nogata Y, Kobayashi M. Measurement of the Adhesion Force of a Living Sessile Organism on Antifouling Coating Surfaces Prepared with Polysulfobetaine-Grafted Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38019926 DOI: 10.1021/acs.langmuir.3c02686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
An antifouling polymer brush-like structure was fabricated by a simple and versatile dip-coating method of sulfobetaine containing copolymer-grafted silica nanoparticles (SiNPs) and alkyl diiodide cross-linkers. Surface-initiated atom transfer radical copolymerization of 3-(N-2-methacryloyloxyethyl-N,N-dimethyl)ammonatopropanesulfonate (MAPS) and N,N-dimethylaminoethyl methacrylate (DMAEMA) was carried out from initiator-immobilized SiNPs to give poly(MAPS-co-DMAEMA)-grafted SiNPs (MAPS/DMAEMA = 9/1, mol/mol) with diameters of 150-170 nm. The SiNP-g-copolymer/2,2,2-trifluoroethanol solution was dip-coated on silicon and glass substrates. Successive treatment with 1,4-diiodobutane in methanol gave a hydrophilic cross-linked coating film for the SiNP-g-copolymer. The cross-linked particle brushes did not peel off from the substrate even after washing with water in an ultrasonic cleaner despite the simple physical absorption of the SiNP-g-copolymer on the substrate surface. The adhesion force of the tentacle of a living barnacle cyprid on a glass surface covered with the cross-linked SiNP-g-copolymer was directly measured by scanning probe microscopy in seawater. The coating film exhibited extremely low adhesion to the cypris larva in the seawater, expecting this to be an effective antifouling property.
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Affiliation(s)
- Kanae Takeuchi
- Graduate School of Engineering, Kogakuin University, Tokyo 192-0015, Japan
| | - Ryota Sato
- Graduate School of Engineering, Kogakuin University, Tokyo 192-0015, Japan
| | - Yasuyuki Nogata
- Sustainable System Research Laboratory, Central Research Institute of Electric Power Industry, Abiko, Chiba 270-1194, Japan
| | - Motoyasu Kobayashi
- School of Advanced Engineering, Kogakuin University, Tokyo 192-0015, Japan
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2
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Zheng X, Ren C, Wei Y, Wang J, Xu X, Du M, Wu C. Soy protein particles with enhanced anti-aggregation behaviors under various heating temperatures, pH, and ionic strengths. Food Res Int 2023; 170:112924. [PMID: 37316041 DOI: 10.1016/j.foodres.2023.112924] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 03/21/2023] [Accepted: 04/26/2023] [Indexed: 06/16/2023]
Abstract
Protein-containing food products are frequently heated during processing to passivate anti-nutritional components. However, heating also contributes to protein aggregation and gelation, which limits its application in protein-based aqueous systems. In this study, heat-stable soy protein particles (SPPs) were fabricated by preheating at 120 °C for 30 min and at 0.5% (w/v) protein concentration. Compared to untreated soy proteins (SPs), SPPs exhibited a higher denaturation ratio, stronger conformational rigidity, compacter colloidal structure, and higher surface charge. The aggregation state of SPs and SPPs at various heating conditions (temperatures, pH, ionic strength, and types) was analyzed by dynamic light scattering, atomic force microscopy, and cryo-scanning electron microscopy. SPPs showed less increase in particle size and greater anti-aggregation ability than SPs. When heated in the presence of salt ions (Na+, Ca2+) or at acidic conditions, both SPs and SPPs formed larger spherical particles, but the size increase rate of SPPs was significantly lower than SPs. These findings provide theoretical information for preparing heat-stable SPPs. Furthermore, the development of SPPs is conducive to designing protein-enriched ingredients for producing innovative foods.
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Affiliation(s)
- Xiaohan Zheng
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China
| | - Chao Ren
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China
| | - Yixue Wei
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China
| | - Jiamei Wang
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China
| | - Xianbing Xu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China
| | - Ming Du
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China
| | - Chao Wu
- School of Food Science and Technology, Dalian Polytechnic University, Dalian, 116034, China; National Engineering Research Center of Seafood, China; Liaoning Key Laboratory of Food Nutrition and Health, China; Collaborative Innovation Center of Provincial and Ministerial Co-construction for Seafood Deep Processing, China.
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3
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Li W, Zhu L, Pan C, Chen W, Xu D, Kang D, Guo L, Mei Q, Zheng P, Zhang M. Insights into the Superior Bioavailability of Biogenic Sulfur from the View of Its Unique Properties: The Key Role of Trace Organic Substances. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:1487-1498. [PMID: 36629799 DOI: 10.1021/acs.est.2c07142] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Elemental sulfur (S0) is widely utilized in environmental pollution control, while its low bioavailability has become a bottleneck for S0-based biotechnologies. Biogenic sulfur (bio-S0) has been demonstrated to have superior bioavailability, while little is known about its mechanisms thus far. This study investigated the bioavailability and relevant properties of bio-S0 based on the denitrifying activity of Thiobacillus denitrificans with chemical sulfur (chem-S0) as the control. It was found that the conversion rate and removal efficiency of nitrate in the bio-S0 system were 2.23 and 2.04 times those of the chem-S0 system. Bio-S0 was not pure orthorhombic sulfur [S: 96.88 ± 0.25% (w/w)]. Trace organic substances detected on the bio-S0 surface were revealed to contribute to its hydrophilicity, resulting in better dispersibility in the aqueous liquid. In addition, the adhesion force of T. denitrificans on bio-S0 was 1.54 times that of chem-S0, endowing a higher bacterial adhesion efficiency on the sulfur particle. The weaker intermolecular binding force due to the low crystallinity of bio-S0 led to enhanced cellular uptake by attached bacteria. The mechanisms for the superior bioavailability of bio-S0 were further proposed. This study provides a comprehensive view of the superior bioavailability of bio-S0 and is beneficial to developing high-quality sulfur resources.
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Affiliation(s)
- Wenji Li
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Lin Zhu
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Chao Pan
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Wenda Chen
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Dongdong Xu
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Da Kang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing100124, China
| | - Leiyan Guo
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Qingqing Mei
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
| | - Ping Zheng
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou, Zhejiang310058, China
| | - Meng Zhang
- Department of Environmental Engineering, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, Zhejiang310058, China
- Zhejiang Province Key Laboratory for Water Pollution Control and Environmental Safety, Hangzhou, Zhejiang310058, China
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4
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Eskhan A, Johnson D. Microscale characterization of abiotic surfaces and prediction of their biofouling/anti-biofouling potential using the AFM colloidal probe technique. Adv Colloid Interface Sci 2022; 310:102796. [DOI: 10.1016/j.cis.2022.102796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 10/11/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022]
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5
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Chai K, Wu Y, Shi W, Duan D, Wu J, Han E. The movement and settlement behaviour of cyprids of Balanus reticulatus on the surfaces of the titanium alloys. BIOFOULING 2022; 38:824-836. [PMID: 36314065 DOI: 10.1080/08927014.2022.2138753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 10/11/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
The motion paths of Balanus reticulatus cyprids were similar on all the titanium alloys surfaces. On the parallel grinding surfaces, the temporary attachment duration and the settlement ratio of the cyprids were influenced by the roughness and the composition of the surfaces and correlated positively. The surface roughness could also change the contact area and the numbers of the attachment points of the cyprids in the similar pattern. Consequently, the roughness and the composition of the surfaces regulated the cyprid settlement by the temporary attachment duration. The cross grinding increased the temporary attachment duration but drastically decreased the settlement ratio to 0 compared to the parallel grinding, possibly due to the voids and the drastic decrease of the contact area and the numbers of the attachment points of the cyprids on the cross grinding surface, respectively. The cross grinding therefore significantly reduced the cyprid settlement compared to the parallel grinding.
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Affiliation(s)
- Ke Chai
- Institute of Corrosion Science and Technology, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Yaohua Wu
- Institute of Corrosion Science and Technology, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Wei Shi
- Institute of Corrosion Science and Technology, Guangzhou, China
| | - Dongxia Duan
- Sunrui Marine Environment Engineering Co., Ltd, Qingdao, China
| | - Jinyi Wu
- Institute of Corrosion Science and Technology, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
| | - Enhou Han
- Institute of Corrosion Science and Technology, Guangzhou, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, China
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6
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Xu Z, Liu Z, Zhang C, Xu D. Advance in barnacle cement with high underwater adhesion. J Appl Polym Sci 2022. [DOI: 10.1002/app.52894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Zhenzhen Xu
- Beijing Institute of Basic Medical Sciences Beijing China
- College of Pharmaceutical Sciences Hebei University Baoding China
| | - Zhongcheng Liu
- College of Pharmaceutical Sciences Hebei University Baoding China
| | - Chao Zhang
- Beijing Institute of Basic Medical Sciences Beijing China
| | - Donggang Xu
- Beijing Institute of Basic Medical Sciences Beijing China
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7
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Dahlgren J, Foy L, Hunsucker K, Gardner H, Swain G, Stafslien SJ, Vanderwal L, Bahr J, Webster DC. Grooming of fouling-release coatings to control marine fouling and determining how grooming affects the surface. BIOFOULING 2022; 38:384-400. [PMID: 35655420 DOI: 10.1080/08927014.2022.2084389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 05/16/2022] [Accepted: 05/24/2022] [Indexed: 06/15/2023]
Abstract
Grooming may be an effective technique to control marine biofouling without damaging the coating or discharging active ingredients into the environment. This study assessed the grooming performance of three experimental biocide-free siloxane polyurethane (SiPU) fouling-release coatings. Coatings were statically immersed in Port Canaveral, Florida, and groomed every two weeks for five months using three different brush types. The ungroomed panels became heavily fouled with biofilm, tubeworms, barnacles, and bryozoans. Two of the brushes were able to control the fouling with a coverage of <5%. The commercial silicone elastomer coating was damaged from grooming procedures, while the SiPU coatings were not. Laboratory biological assays were carried out and mirrored the grooming results. Through surface characterization techniques, it was concluded that the coatings were unaffected by the grooming procedures. This study shows that marine fouling on durable SiPU fouling-release coatings can be controlled via grooming without damage or changing the surface properties.
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Affiliation(s)
- Joseph Dahlgren
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA
| | - Lauren Foy
- Center for Corrosion and Biofouling Control, Florida Institute of Technology, Florida, USA
| | - Kelli Hunsucker
- Center for Corrosion and Biofouling Control, Florida Institute of Technology, Florida, USA
| | - Harrison Gardner
- Center for Corrosion and Biofouling Control, Florida Institute of Technology, Florida, USA
| | - Geoff Swain
- Center for Corrosion and Biofouling Control, Florida Institute of Technology, Florida, USA
| | - Shane J Stafslien
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA
| | - Lyndsi Vanderwal
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA
| | - James Bahr
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA
| | - Dean C Webster
- Department of Coatings and Polymeric Materials, North Dakota State University, Fargo, North Dakota, USA
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8
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Zhang Y, Zhu X, Chen B. Adhesion force evolution of protein on the surfaces with varied hydration extent: Quantitative determination via atomic force microscopy. J Colloid Interface Sci 2022; 608:255-264. [PMID: 34626972 DOI: 10.1016/j.jcis.2021.09.131] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Revised: 09/05/2021] [Accepted: 09/21/2021] [Indexed: 01/03/2023]
Abstract
The adhesion force evolution of protein on surfaces with continuously varied hydrophobicity/hydration layer has not been completely clarified yet, limiting the further development of environmental applications such as membrane anti-biofouling and selective adsorption of the functional surfaces. Herein, chemical force spectroscopy using atomic force microscopy (AFM) was utilized to quantify the evolution of the adhesion forces of protein on hydration surfaces in water, where bovine serum albumin (BSA) was immobilized on an AFM tip as the representative protein. The stiffness, roughness and charge properties of the substrate surfaces were kept constant and the hydrophobicity was the only variant to monitor the role of hydrated water layers in protein adhesion. The adhesion force increased non-monotonically as a function of hydrophobicity of substrate surfaces, which was related to the concentration of humic acid, and independent of pH values and ionic strength. The non-monotonic variation occurred in the range of contact angle at 60-80° due to the mutual restriction between solid-liquid interface energy and solid-solid interface energy. Hydrophobic attraction was the dominant force that drove adhesion of BSA to these model substrate surfaces, but the passivation of hydration layers at the interface could weaken the hydrophobic attraction. In contrast to the measurements in water, the adhesion forces decreased as a function of surface hydrophobicity when measured in air, because capillary forces from condensation water dominated adhesion forces. The passivation of hydration layers of protein was revealed by quantitatively determining the evolution of adhesion forces on the hydration surfaces of varying hydrophobicity, which was ignored by traditional adhesion theory.
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Affiliation(s)
- Yuyao Zhang
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China.
| | - Xiaoying Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China.
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, China.
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9
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Na X, Wang J, Ma W, Xu X, Zhong L, Wu C, Du M, Zhu B. Reduced Adhesive Force Leading to Enhanced Thermal Stability of Soy Protein Particles by Combined Preheating and Ultrasonic Treatment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:3015-3025. [PMID: 33685122 DOI: 10.1021/acs.jafc.0c07302] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Developing liquid systems with high protein contents is drawing intensive attention; however, this is challenged by heat-induced aggregation and gelation of proteins. Herein, we described a facile but robust approach of combined preheating and ultrasonic treatment (CPUT) to fabricate soy protein particles (SPPs) with enhanced heat stability. Results showed that these heat-stable particles, upon reheating at 1% (w/v), showed antiaggregation property evidenced from no obvious changes of the particle size distributions of suspensions. Besides, no gelation was found in the reheated test for SPPs suspended even at a concentration of 10% (w/v). In contrast, the control formed sol-gel after heating. The rearrangements of soy protein molecules by CPUT led to the formation of SPPs with reduced surface energy, which was primarily responsible for their heat stability. These findings highlighted that the CPUT could prepare thermally stable soy proteins, providing insights into the application of soy proteins in protein-enriched beverages.
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Affiliation(s)
| | | | | | | | - Limin Zhong
- Ganzhou Quanbiao Biological Technolgy Co., Ltd., Ganzhou 341100, China
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10
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Zhang Y, Zhu X, Chen B. Nanoscale Profiling of 2D Surface Hydrophobicity Recognition of Environmental Media via AFM Measurements In Situ. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:9315-9324. [PMID: 32633943 DOI: 10.1021/acs.est.0c00211] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The surface hydrophobicity and its heterogeneity are essential physicochemical properties of functional materials and environmental media, which directly influence many critical processes, such as the adsorption capacity of absorbents, water/fertilizer retention of soil and oil-water separation performances of membranes. The conventional method to characterize the surface hydrophobicity is based on the water/air/oil contact angle, which could only analyze the macroscale local hydrophobicity of the surfaces. Until now, it is impossible to profile two-dimensional surface hydrophobicity recognition in the nanoscale. Here we utilized an atomic force microscopy (AFM)-based chemical force spectroscopy to measure the topography and the local adhesion forces in the nanoscale. A novel approach is established to exploit adhesion forces to extract the hydrophobic attractions, enabling mapping of the surface hydrophobicity of environmental media in the nanoscale, which was validated by studying synthetic self-assembled monolayers of known composition. The new method was then applied to directly measure the hydrophobicity of porous biochar particles, to profile two-dimensional nanoscale hydrophobicity images of graphene oxide, and to observe the in situ variations of the graphite surface hydrophobicity in the adsorption process of benzylamine, which cannot be monitored by the conventional methods. The advantages of direct observations of the surface hydrophobicity recognition from a single AFM image dynamically and quantitatively may provide an in-depth insight into the surface hydrophobicity in the nanoscale.
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Affiliation(s)
- Yuyao Zhang
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, P. R. China
| | - Xiaoying Zhu
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, P. R. China
| | - Baoliang Chen
- Department of Environmental Science, Zhejiang University, Hangzhou, Zhejiang 310058, P. R. China
- Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou, Zhejiang 310058, P. R. China
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11
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Guo S, Quintana R, Cirelli M, Toa ZSD, Arjunan Vasantha V, Kooij ES, Jańczewski D, Vancso GJ. Brush Swelling and Attachment Strength of Barnacle Adhesion Protein on Zwitterionic Polymer Films as a Function of Macromolecular Structure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:8085-8094. [PMID: 31099575 PMCID: PMC6587155 DOI: 10.1021/acs.langmuir.9b00918] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/15/2019] [Indexed: 06/09/2023]
Abstract
The exceptional hydration of sulfobetaine polymer brushes and their resistance toward nonspecific protein absorption allows for the construction of thin films with excellent antibiofouling properties. In this work, swollen sulfobetaine brushes, prepared by surface-initiated atom transfer radical polymerization of two monomers, differentiated by the nature of the polymerizable group, are studied and compared by a liquid-cell atomic force microscopy technique and spectroscopic ellipsometry. Colloidal AFM-based force spectroscopy is employed to estimate brush grafting density and characterize nanomechanical properties in salt water. When the ionic strength-induced swelling behaviors of the two systems are compared, the differences observed on the antipolyelectrolyte response can be correlated with the stiffness variation on brush compression, likely to be promoted by solvation differences. The higher solvation of amide groups is proposed to be responsible for the lower adhesion force of the barnacle cyprid's temporary adhesive proteins. The adhesion results provide further insights into the antibiofouling activity against barnacle cyprid settlement attributed to polysulfobetaine brushes.
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Affiliation(s)
- Shifeng Guo
- Institute
of Materials Research and Engineering A*STAR (Agency for Science,
Technology and Research), Innovis, #08-03, 2 Fusionpolis Way, Singapore 138634
- CAS
Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese
Academy of Sciences, Shenzhen, Guangdong 518055, China
| | - Robert Quintana
- Institute
of Materials Research and Engineering A*STAR (Agency for Science,
Technology and Research), Innovis, #08-03, 2 Fusionpolis Way, Singapore 138634
- Materials
Research and Technology Department, Luxembourg
Institute of Science and Technology (LIST), L-4422 Belvaux, Luxembourg
| | - Marco Cirelli
- Materials Science and Technology of Polymers, MESA+
Institute for
Nanotechnology, Faculty Engineering Technology, Production Technology, and Physics of Interfaces
and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Zi Siang Desmond Toa
- Institute
of Materials Research and Engineering A*STAR (Agency for Science,
Technology and Research), Innovis, #08-03, 2 Fusionpolis Way, Singapore 138634
| | - Vivek Arjunan Vasantha
- Institute
of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong
Island, Singapore 627833
| | - E. Stefan Kooij
- Materials Science and Technology of Polymers, MESA+
Institute for
Nanotechnology, Faculty Engineering Technology, Production Technology, and Physics of Interfaces
and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Dominik Jańczewski
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - G. Julius Vancso
- Institute
of Chemical and Engineering Sciences, A*STAR, 1 Pesek Road, Jurong
Island, Singapore 627833
- Materials Science and Technology of Polymers, MESA+
Institute for
Nanotechnology, Faculty Engineering Technology, Production Technology, and Physics of Interfaces
and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
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13
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Liang C, Ye Z, Xue B, Zeng L, Wu W, Zhong C, Cao Y, Hu B, Messersmith PB. Self-Assembled Nanofibers for Strong Underwater Adhesion: The Trick of Barnacles. ACS APPLIED MATERIALS & INTERFACES 2018; 10:25017-25025. [PMID: 29990429 DOI: 10.1021/acsami.8b04752] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Developing adhesives that can function underwater remains a major challenge for bioengineering, yet many marine creatures, exemplified as mussels and barnacles, have evolved their unique proteinaceous adhesives for strong wet adhesion. The mechanisms underlying the strong adhesion of these natural adhesive proteins provide rich information for biomimetic efforts. Here, combining atomic force microscopy (AFM) imaging and force spectroscopy, we examine the effects of pH on the self-assembly and adhesive properties of cp19k, a key barnacle underwater adhesive protein. For the first time, we confirm that the bacterial recombinant Balanus albicostatus cp19k (rBalcp19k), which contains no 3,4-dihydroxyphenylalanine (DOPA) or any other amino acids with post-translational modifications, can self-assemble into aggregated nanofibers at acidic pHs. Under moderately acidic conditions, the adhesion strength of unassembled monomeric rBalcp19k on mica is only slightly lower than that of a commercially available mussel adhesive protein mixture, yet the adhesion ability of rBalcp19k monomers decreases significantly at increased pH. In contrast, upon preassembly at acidic and low-salinity conditions, rBalcp19k nanofibers keep stable in basic and high-salinity seawater and display much stronger adhesion and thus show resistance to its adverse impacts. Besides, we find that the adhesion ability of Balcp19k is not impaired when it is combined with an N-terminal Thioredoxin (Trx) tag, yet whether the self-assembly property will be disrupted is not determined. Collectively, the self-assembly-enhanced adhesion presents a previously unexplored mechanism for the strong wet adhesion of barnacle cement proteins and may lead to the design of barnacle-inspired adhesive materials.
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Affiliation(s)
- Chao Liang
- Department of Chemistry and Biology, College of Science , National University of Defense Technology , Changsha 410073 , P. R. China
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Department of Physics , Nanjing University , Nanjing 210093 , P. R. China
| | - Zonghuang Ye
- Department of Chemistry and Biology, College of Science , National University of Defense Technology , Changsha 410073 , P. R. China
| | - Bin Xue
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Department of Physics , Nanjing University , Nanjing 210093 , P. R. China
| | - Ling Zeng
- Department of Chemistry and Biology, College of Science , National University of Defense Technology , Changsha 410073 , P. R. China
| | - Wenjian Wu
- Department of Chemistry and Biology, College of Science , National University of Defense Technology , Changsha 410073 , P. R. China
| | - Chao Zhong
- School of Physical Science and Technology , ShanghaiTech University , Shanghai 201210 , P. R. China
| | - Yi Cao
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructures, Department of Physics , Nanjing University , Nanjing 210093 , P. R. China
| | - Biru Hu
- Department of Chemistry and Biology, College of Science , National University of Defense Technology , Changsha 410073 , P. R. China
| | - Phillip B Messersmith
- Departments of Materials Science and Engineering and Bioengineering , University of California , Berkeley , California 94720 , United States
- Materials Science Division , Lawrence Berkeley National Laboratory , Berkeley , California 94720 , United States
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14
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Liu A, Yang L, Traulsen CHH, Cornelissen JJLM. Immobilization of catalytic virus-like particles in a flow reactor. Chem Commun (Camb) 2018. [PMID: 28640305 DOI: 10.1039/c7cc03024j] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A functional microfluidic reactor is constructed by the immobilization of gold containing virus-based protein cages that catalyze the reduction of nitro-arenes with high efficiency.
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Affiliation(s)
- A Liu
- Biomolecular Nanotechnology (BNT), MESA+ Institute for Nanotechnology, University of Twente, The Netherlands.
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15
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Guo S, Pranantyo D, Kang ET, Loh XJ, Zhu X, Jańczewski D, Neoh KG. Dominant Albumin-Surface Interactions under Independent Control of Surface Charge and Wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:1953-1966. [PMID: 29319318 DOI: 10.1021/acs.langmuir.7b04117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Understanding protein adsorption behaviors on solid surfaces constitutes an important step toward development of efficacious and biocompatible medical devices. Both surface charge and wettability have been shown to influence protein adsorption attributes, including kinetics, quantities, deformation, and reversibility. However, determining the dominant interaction in these surface-induced phenomena is challenging because of the complexity of inter-related mechanisms at the liquid/solid interface. Herein, we reveal the dominant interfacial forces in these essential protein adsorption attributes under the influence of a combination of surface charge and wettability, using quartz crystal microbalance with dissipation monitoring and atomic force microscopy-based force spectroscopy on a series of model surfaces. These surfaces were fabricated via layer-by-layer assembly, which allowed two-dimensional control of surface charge and wettability with minimal cross-parameter dependency. We focused on a soft globular protein, bovine serum albumin (BSA), which is prone to conformational changes during adsorption. The information obtained from the two techniques shows that both surface charge and hydrophobicity can increase the protein-surface interaction forces and the adsorbed amount. However, surface hydrophobicity triggered a greater extent of deformation in the adsorbed BSA molecules, leading to more dehydration, spreading, and resistance to elution by ionic strength changes regardless of the surface charge. The role played by the surface charge in the adsorbed protein conformation and extent of desorption induced by changes in the ionic strength is secondary to that of surface hydrophobicity. These findings advance the understanding of how surface chemistry and properties can be tailored for directing protein-substrate interactions.
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Affiliation(s)
- Shanshan Guo
- NUS Graduate School for Integrative Science and Engineering, National University of Singapore , Kent Ridge, 117576, Singapore
| | - Dicky Pranantyo
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
| | - En-Tang Kang
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
| | - Xian Jun Loh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research) , 2 Fusionopolis Way, 138634, Singapore
- Department of Materials Science and Engineering, National University of Singapore , 9 Engineering Drive 1, 117576, Singapore
- Singapore Eye Research Institute , 11 Third Hospital Avenue, 168751, Singapore
| | - Xiaoying Zhu
- Department of Environmental Science, Zhejiang University , Hangzhou 310058, China
| | - Dominik Jańczewski
- Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - Koon Gee Neoh
- NUS Graduate School for Integrative Science and Engineering, National University of Singapore , Kent Ridge, 117576, Singapore
- Department of Chemical and Biomolecular Engineering, National University of Singapore , 4 Engineering Drive 4, 119260, Singapore
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16
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Xiao K, Cao WB, Rong CH, Chen LG, Yang XX, Wen WJ, Qian PY, Hu ZL, Xu Y, Zhang Y. A novel assessment of the traction forces upon settlement of two typical marine fouling invertebrates using PDMS micropost arrays. Biol Open 2018; 7:bio030262. [PMID: 29242196 PMCID: PMC5829505 DOI: 10.1242/bio.030262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 11/28/2017] [Indexed: 11/30/2022] Open
Abstract
Marine biofouling poses a severe threat to maritime and aquaculture industries. To prevent the attachment of marine biofouling organisms on man-made structures, countless cost and effort was spent annually. In particular, most attention has been paid on the development of efficient and environmentally friendly fouling-resistant coatings, as well as larval settlement mechanism of several major biofouling invertebrates. In this study, polydimethylsiloxane (PDMS) micropost arrays were utilized as the settlement substrata and opposite tractions were identified during early settlement of the barnacle Amphibalanus amphitrite and the bryozoan Bugula neritina The settling A. amphitrite pushed the periphery microposts with an average traction force of 376.2 nN, while settling B. neritina pulled the periphery microposts with an average traction force of 205.9 nN. These micropost displacements are consistent with the body expansion of A. amphitrite during early post-settlement metamorphosis stage and elevation of wall epithelium of B. neritina during early pre-ancestrula stage, respectively. As such, the usage of micropost array may supplement the traditional histological approach to indicate the early settlement stages or even the initiation of larval settlement of marine fouling organisms, and could finally aid in the development of automatic monitoring platform for the real-time analysis on this complex biological process.
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Affiliation(s)
- Kang Xiao
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P.R. China
- Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, P.R. China
| | - Wen-Bin Cao
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China
| | - Cu-Huang Rong
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P.R. China
| | - Lian-Guo Chen
- Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China
| | - Xiao-Xue Yang
- Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China
| | - Wei-Jia Wen
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China
| | - Pei-Yuan Qian
- Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P.R. China
| | - Zhang-Li Hu
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P.R. China
| | - Ying Xu
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P.R. China
| | - Yu Zhang
- Shenzhen Key Laboratory of Marine Bioresource and Eco-environmental Science, Guangdong Engineering Research Center for Marine Algal Biotechnology, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen 518060, P.R. China
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17
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Brzozowska AM, Maassen S, Goh Zhi Rong R, Benke PI, Lim CS, Marzinelli EM, Jańczewski D, Teo SLM, Vancso GJ. Effect of Variations in Micropatterns and Surface Modulus on Marine Fouling of Engineering Polymers. ACS APPLIED MATERIALS & INTERFACES 2017; 9:17508-17516. [PMID: 28481498 PMCID: PMC5445506 DOI: 10.1021/acsami.6b14262] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We report on the marine fouling and fouling release effects caused by variations of surface mechanical properties and microtopography of engineering polymers. Polymeric materials were covered with hierarchical micromolded topographical patterns inspired by the shell of the marine decapod crab Myomenippe hardwickii. These micropatterned surfaces were deployed in field static immersion tests. PDMS, polyurethane, and PMMA surfaces with higher elastic modulus and hardness were found to accumulate more fouling and exhibited poor fouling release properties. The results indicate interplay between surface mechanical properties and microtopography on antifouling performance.
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Affiliation(s)
- Agata Maria Brzozowska
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
| | - Stan Maassen
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
- Faculty of Science
and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
| | - Rubayn Goh Zhi Rong
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore
| | - Peter Imre Benke
- Singapore
Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, 60 Nanyang Drive, 637551 Singapore
- Environmental
Research Institute, National University
of Singapore, 21 Lower
Kent Ridge Road, 119077 Singapore
| | - Chin-Sing Lim
- St
John’s Island National Marine Laboratory, Tropical Marine Science
Institute, National University of Singapore, 18 Kent Ridge Road, 119227 Singapore
| | - Ezequiel M. Marzinelli
- Centre for Marine Bio-Innovation, School
of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia
- Sydney Institute of Marine Science, 19 Chowder Bay Rd, Mosman, NSW 2088, Australia
| | - Dominik Jańczewski
- Institute of Materials
Research and Engineering, Agency for Science,
Technology and Research, 2 Fusionopolis Way, Innovis, #08-03, 138634 Singapore
- Laboratory of Technological
Processes, Faculty of Chemistry, Warsaw
University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- E-mail: . Tel: +48 22 234 5583. Fax: +48 22 234 5504
| | - Serena Lay-Ming Teo
- St
John’s Island National Marine Laboratory, Tropical Marine Science
Institute, National University of Singapore, 18 Kent Ridge Road, 119227 Singapore
- E-mail: . Tel: +65 6774 9887. Fax: +65 6776 1455
| | - G. Julius Vancso
- Institute of Chemical
and Engineering Sciences, Agency for Science,
Technology and Research, 1 Pesek Road, 627833 Singapore
- MESA+ Institute for Nanotechnology, Materials Science
and Technology of Polymers, University of
Twente, 7500 AE Enschede, The Netherlands
- E-mail: . Tel.: +31 53 489 2974. Fax: +31 53 489 3823
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18
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Galhenage TP, Hoffman D, Silbert SD, Stafslien SJ, Daniels J, Miljkovic T, Finlay JA, Franco SC, Clare AS, Nedved BT, Hadfield MG, Wendt DE, Waltz G, Brewer L, Teo SLM, Lim CS, Webster DC. Fouling-Release Performance of Silicone Oil-Modified Siloxane-Polyurethane Coatings. ACS APPLIED MATERIALS & INTERFACES 2016; 8:29025-29036. [PMID: 27696809 DOI: 10.1021/acsami.6b09484] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The effect of incorporation of silicone oils into a siloxane-polyurethane fouling-release coatings system was explored. Incorporation of phenylmethyl silicone oil has been shown to improve the fouling-release performance of silicone-based fouling-release coatings through increased interfacial slippage. The extent of improvement is highly dependent upon the type and composition of silicone oil used. The siloxane-polyurethane (SiPU) coating system is a tough fouling-release solution, which combines the mechanical durability of polyurethane while maintaining comparable fouling-release performance with regard to commercial standards. To further improve the fouling-release performance of the siloxane-PU coating system, the use of phenylmethyl silicones oils was studied. Coatings formulations were prepared incorporating phenylmethyl silicone oils having a range of compositions and viscosities. Contact angle and surface energy measurements were conducted to evaluate the surface wettability of the coatings. X-ray photoelectron spectroscopy (XPS) depth profiling experiments demonstrated self-stratification of silicone oil along with siloxane to the coating-air interface. Several coating formulations displayed improved or comparable fouling-release performance to commercial standards during laboratory biological assay tests for microalgae (Navicula incerta), macroalgae (Ulva linza), adult barnacles (Balanus amphitrite syn. Amphibalanus amphitrite), and mussels (Geukensia demissa). Selected silicone-oil-modified siloxane-PU coatings also demonstrated comparable fouling-release performance in field immersion trials. In general, modifying the siloxane-PU fouling-release coatings with a small amount (1-5 wt % basis) of phenylmethyl silicone oil resulted in improved performance in several laboratory biological assays and in long-term field immersion assessments.
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Affiliation(s)
- Teluka P Galhenage
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo North Dakota 58108, United States
| | - Dylan Hoffman
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo North Dakota 58108, United States
| | - Samantha D Silbert
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo North Dakota 58108, United States
| | - Shane J Stafslien
- Center for Nanoscale Science and Engineering, North Dakota State University , Fargo, North Dakota 58108, United States
| | - Justin Daniels
- Center for Nanoscale Science and Engineering, North Dakota State University , Fargo, North Dakota 58108, United States
| | - Tatjana Miljkovic
- Department of Statistics, Miami University , Oxford, Ohio 45056, United States
| | - John A Finlay
- School of Marine Science and Technology, Newcastle University , Newcastle upon Tyne, NE1 7RU, U.K
| | - Sofia C Franco
- School of Marine Science and Technology, Newcastle University , Newcastle upon Tyne, NE1 7RU, U.K
| | - Anthony S Clare
- School of Marine Science and Technology, Newcastle University , Newcastle upon Tyne, NE1 7RU, U.K
| | - Brian T Nedved
- Kewalo Marine Laboratory, University of Hawaii at Manoa , Honolulu Hawaii 96813, United States
| | - Michael G Hadfield
- Kewalo Marine Laboratory, University of Hawaii at Manoa , Honolulu Hawaii 96813, United States
| | - Dean E Wendt
- Center for Coastal Marine Sciences, Biological Sciences Department, California Polytechnic State University , San Luis Obispo California 93407, United States
| | - Grant Waltz
- Center for Coastal Marine Sciences, Biological Sciences Department, California Polytechnic State University , San Luis Obispo California 93407, United States
| | - Lenora Brewer
- Center for Coastal Marine Sciences, Biological Sciences Department, California Polytechnic State University , San Luis Obispo California 93407, United States
| | - Serena L M Teo
- Tropical Marine Science Institute, National University of Singapore , Singapore 119227
| | - Chin-Sing Lim
- Tropical Marine Science Institute, National University of Singapore , Singapore 119227
| | - Dean C Webster
- Department of Coatings and Polymeric Materials, North Dakota State University , Fargo North Dakota 58108, United States
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19
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Guo S, Zhu X, Jańczewski D, Lee SSC, He T, Teo SLM, Vancso GJ. Measuring protein isoelectric points by AFM-based force spectroscopy using trace amounts of sample. NATURE NANOTECHNOLOGY 2016; 11:817-23. [PMID: 27454881 DOI: 10.1038/nnano.2016.118] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2016] [Accepted: 06/03/2016] [Indexed: 05/14/2023]
Abstract
Protein charge at various pH and isoelectric point (pI) values is important in understanding protein function. However, often only trace amounts of unknown proteins are available and pI measurements cannot be obtained using conventional methods. Here, we show a method based on the atomic force microscope (AFM) to determine pI using minute quantities of proteins. The protein of interest is immobilized on AFM colloidal probes and the adhesion force of the protein is measured against a positively and a negatively charged substrate made by layer-by-layer deposition of polyelectrolytes. From the AFM force-distance curves, pI values with an estimated accuracy of ±0.25 were obtained for bovine serum albumin, myoglobin, fibrinogen and ribonuclease A over a range of 4.7-9.8. Using this method, we show that the pI of the 'footprint' of the temporary adhesive proteins secreted by the barnacle cyprid larvae of Amphibalanus amphitrite is in the range 9.6-9.7.
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Affiliation(s)
- Shifeng Guo
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, No. 08-03, Singapore 138634, Singapore
| | - Xiaoying Zhu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, No. 08-03, Singapore 138634, Singapore
| | - Dominik Jańczewski
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, No. 08-03, Singapore 138634, Singapore
- Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Serina Siew Chen Lee
- Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, 119227 Singapore, Singapore
| | - Tao He
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, No. 08-03, Singapore 138634, Singapore
| | - Serena Lay Ming Teo
- Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, 119227 Singapore, Singapore
| | - G Julius Vancso
- Institute of Chemical and Engineering Sciences A*STAR, 1 Pesek Road, Jurong Island, 627833 Singapore, Singapore
- MESA+ Institute for Nanotechnology, Materials Science and Technology of Polymers, University of Twente, PO Box 217, 7500 AE Enschede, The Netherlands
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20
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Zhu X, Guo S, He T, Jiang S, Jańczewski D, Vancso GJ. Engineered, Robust Polyelectrolyte Multilayers by Precise Control of Surface Potential for Designer Protein, Cell, and Bacteria Adsorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1338-1346. [PMID: 26756285 DOI: 10.1021/acs.langmuir.5b04118] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Cross-linked layer-by-layer (LbL) assemblies with a precisely tuned surface ζ-potential were fabricated to control the adsorption of proteins, mammalian cells, and bacteria for different biomedical applications. Two weak polyions including a synthesized polyanion and polyethylenimine were assembled under controlled conditions and cross-linked to prepare three robust LbL films as model surfaces with similar roughness and water affinity but displaying negative, zero, and positive net charges at the physiological pH (7.4). These surfaces were tested for their abilities to adsorb proteins, including bovine serum albumin (BSA) and lysozyme (LYZ). In the adsorption tests, the LbL films bind more proteins with opposite charges but less of those with like charges, indicating that electrostatic interactions play a major role in protein adsorption. However, LYZ showed higher nonspecific adsorption than BSA, because of the specific behavior of LYZ molecules, such as stacked multilayer formation during adsorption. To exclude such stacking effects from experiments, protein molecules were covalently immobilized on AFM colloidal probes to measure the adhesion forces against the model surfaces utilizing direct protein molecule-surface contacts. The results confirmed the dominating role of electrostatic forces in protein adhesion. In fibroblast cell and bacteria adhesion tests, similar trends (high adhesion on positively charged surfaces, but much lower on neutral and negatively charged surfaces) were observed because the fibroblast cell and bacterial surfaces studied possess negative potentials. The cross-linked LbL films with improved stability and engineered surface charge described in this study provide an excellent platform to control the behavior of different charged objects and can be utilized in practical biomedical applications.
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Affiliation(s)
- Xiaoying Zhu
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore
| | - Shifeng Guo
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore
| | - Tao He
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore
| | - Shan Jiang
- Institute of Materials Research and Engineering A*STAR (Agency for Science, Technology and Research), 2 Fusionopolis Way, Innovis, #08-03, Singapore 138634, Singapore
| | - Dominik Jańczewski
- Laboratory of Technological Processes, Faculty of Chemistry, Warsaw University of Technology , Noakowskiego 3, 00-664 Warsaw, Poland
| | - G Julius Vancso
- MESA+ Institute for Nanotechnology, Materials Science and Technology of Polymers, University of Twente , P.O. Box 217, 7500 AE Enschede, The Netherlands
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21
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Mu Y, Wan X. Simple but Strong: A Mussel-Inspired Hot Curing Adhesive Based on Polyvinyl Alcohol Backbone. Macromol Rapid Commun 2016; 37:545-50. [DOI: 10.1002/marc.201500723] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/05/2016] [Indexed: 02/06/2023]
Affiliation(s)
- Youbing Mu
- The Key Laboratory of Bio-based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; 189 Songling Road Qingdao P. R. China
- University of Chinese Academy of Sciences; 19A Yuquan Road Beijing 100049 P. R. China
| | - Xiaobo Wan
- The Key Laboratory of Bio-based Materials; Qingdao Institute of Bioenergy and Bioprocess Technology; Chinese Academy of Sciences; 189 Songling Road Qingdao P. R. China
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22
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Higaki Y, Nishida J, Takenaka A, Yoshimatsu R, Kobayashi M, Takahara A. Versatile inhibition of marine organism settlement by zwitterionic polymer brushes. Polym J 2015. [DOI: 10.1038/pj.2015.77] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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23
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Zhu X, Jańczewski D, Guo S, Lee SSC, Parra Velandia FJ, Teo SLM, He T, Puniredd SR, Vancso GJ. Polyion multilayers with precise surface charge control for antifouling. ACS APPLIED MATERIALS & INTERFACES 2015; 7:852-861. [PMID: 25485625 DOI: 10.1021/am507371a] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report on a molecular fabrication approach to precisely control surface ζ potentials of polymeric thin layers constructed by electrostatic layer-by-layer (LbL) assembly methods. The protocol established allows us to achieve surface isoelectric points (IEP) in the pH range of 6-10. Poly(acrylic acid) (PAA, a weak polyanion) and poly(diallyldimethylammonium chloride) (PDADMAC, a strong polycation) were chosen to build up the bulk films. The weak polycation polyethylenimine (PEI) was applied as a top layer. A unique feature of this approach is that the chemical composition of the top layer is not affected by the manipulation of the ζ potential of the films. Surface charge tuning is achieved by controlling the degree of ionization of the weak polyelectrolytes at various pH values and subsequent manipulation of the amount of polyelectrolyte deposited in the penultimate and last layers, respectively. Following assembly and characterization, the films were used as candidates for antifouling surfaces. The fouling behavior of barnacle cyprids and bacteria on the LbL films with similar hydrophilicity and roughness but different surface charge densities were studied. We found that more cyprids of Amphibalanus amphitrite settled on the negatively charged LbL film compared to the neutral or positively charged LbL film. In bacterial adhesion tests employing Pseudomonas, Escherichia coli, and Staphylococcus aureus, more bacteria were observed on the positively charged LbL film compared with the neutral and negatively charged LbL films, possibly as a result of the negative potential of the bacterial cell wall. The procedures proposed allow one to adjust surface isoelectric points of LbL architectures to achieve optimal antifouling performance of a given material taking into account specific pH values of the environment and the character of the fouler.
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Affiliation(s)
- Xiaoying Zhu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 3 Research Link, Singapore 117602
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